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Call it once at startup, then use the returned function in your framework's middleware\u002Fhook system.",[551,552,558],"pre",{"className":553,"code":554,"filename":555,"language":556,"meta":557,"style":557},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { createAuthMiddleware } from 'evlog\u002Fbetter-auth'\n\nconst identify = createAuthMiddleware(auth, {\n  exclude: ['\u002Fapi\u002Fauth\u002F**', '\u002Fapi\u002Fpublic\u002F**'],\n  include: ['\u002Fapi\u002F**'],\n  maskEmail: true,\n})\n","server\u002Fmiddleware\u002Fauth-identify.ts","typescript","",[543,559,560,593,600,625,661,682,696],{"__ignoreMap":557},[561,562,565,569,573,577,580,583,586,590],"span",{"class":563,"line":564},"line",1,[561,566,568],{"class":567},"s7zQu","import",[561,570,572],{"class":571},"sMK4o"," {",[561,574,576],{"class":575},"sTEyZ"," createAuthMiddleware",[561,578,579],{"class":571}," }",[561,581,582],{"class":567}," from",[561,584,585],{"class":571}," '",[561,587,589],{"class":588},"sfazB","evlog\u002Fbetter-auth",[561,591,592],{"class":571},"'\n",[561,594,596],{"class":563,"line":595},2,[561,597,599],{"emptyLinePlaceholder":598},true,"\n",[561,601,603,607,610,613,616,619,622],{"class":563,"line":602},3,[561,604,606],{"class":605},"spNyl","const",[561,608,609],{"class":575}," identify ",[561,611,612],{"class":571},"=",[561,614,576],{"class":615},"s2Zo4",[561,617,618],{"class":575},"(auth",[561,620,621],{"class":571},",",[561,623,624],{"class":571}," {\n",[561,626,628,632,635,638,641,644,646,648,650,653,655,658],{"class":563,"line":627},4,[561,629,631],{"class":630},"swJcz","  exclude",[561,633,634],{"class":571},":",[561,636,637],{"class":575}," [",[561,639,640],{"class":571},"'",[561,642,643],{"class":588},"\u002Fapi\u002Fauth\u002F**",[561,645,640],{"class":571},[561,647,621],{"class":571},[561,649,585],{"class":571},[561,651,652],{"class":588},"\u002Fapi\u002Fpublic\u002F**",[561,654,640],{"class":571},[561,656,657],{"class":575},"]",[561,659,660],{"class":571},",\n",[561,662,664,667,669,671,673,676,678,680],{"class":563,"line":663},5,[561,665,666],{"class":630},"  include",[561,668,634],{"class":571},[561,670,637],{"class":575},[561,672,640],{"class":571},[561,674,675],{"class":588},"\u002Fapi\u002F**",[561,677,640],{"class":571},[561,679,657],{"class":575},[561,681,660],{"class":571},[561,683,685,688,690,694],{"class":563,"line":684},6,[561,686,687],{"class":630},"  maskEmail",[561,689,634],{"class":571},[561,691,693],{"class":692},"sfNiH"," true",[561,695,660],{"class":571},[561,697,699,702],{"class":563,"line":698},7,[561,700,701],{"class":571},"}",[561,703,704],{"class":575},")\n",[540,706,707,708,711,712,714,715,718],{},"The function signature is ",[543,709,710],{},"(log, headers, path?) => Promise\u003Cboolean>",". It resolves the session, calls ",[543,713,548],{},", captures timing into ",[543,716,717],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[720,721,332],"h2",{"id":722},"options",[540,724,725,726,733],{},"Inherits all ",[727,728,730,732],"a",{"href":729},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[543,731,548],{}," options",", plus:",[735,736,737,756],"table",{},[738,739,740],"thead",{},[741,742,743,747,750,753],"tr",{},[744,745,746],"th",{},"Option",[744,748,749],{},"Type",[744,751,752],{},"Default",[744,754,755],{},"Description",[757,758,759,780,799,818],"tbody",{},[741,760,761,767,772,777],{},[762,763,764],"td",{},[543,765,766],{},"exclude",[762,768,769],{},[543,770,771],{},"string[]",[762,773,774],{},[543,775,776],{},"['\u002Fapi\u002Fauth\u002F**']",[762,778,779],{},"Route patterns to skip (glob).",[741,781,782,787,791,796],{},[762,783,784],{},[543,785,786],{},"include",[762,788,789],{},[543,790,771],{},[762,792,793],{},[543,794,795],{},"undefined",[762,797,798],{},"If set, only matching routes are resolved.",[741,800,801,806,811,815],{},[762,802,803],{},[543,804,805],{},"onIdentify",[762,807,808],{},[543,809,810],{},"(log, session) => void",[762,812,813],{},[543,814,795],{},[762,816,817],{},"Called after successful identification.",[741,819,820,825,830,834],{},[762,821,822],{},[543,823,824],{},"onAnonymous",[762,826,827],{},[543,828,829],{},"(log) => void",[762,831,832],{},[543,833,795],{},[762,835,836],{},"Called when no session is found.",[720,838,840],{"id":839},"skip-the-routes-that-do-not-need-a-session","Skip the routes that do not need a session",[540,842,843],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[551,845,847],{"className":553,"code":846,"language":556,"meta":557,"style":557},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[543,848,849,865,874,889,902,916,923],{"__ignoreMap":557},[561,850,851,853,855,857,859,861,863],{"class":563,"line":564},[561,852,606],{"class":605},[561,854,609],{"class":575},[561,856,612],{"class":571},[561,858,576],{"class":615},[561,860,618],{"class":575},[561,862,621],{"class":571},[561,864,624],{"class":571},[561,866,867,869,871],{"class":563,"line":595},[561,868,631],{"class":630},[561,870,634],{"class":571},[561,872,873],{"class":575}," [\n",[561,875,876,879,881,883,885],{"class":563,"line":602},[561,877,878],{"class":571},"    '",[561,880,643],{"class":588},[561,882,640],{"class":571},[561,884,621],{"class":571},[561,886,888],{"class":887},"sHwdD","     \u002F\u002F Better Auth itself\n",[561,890,891,893,895,897,899],{"class":563,"line":627},[561,892,878],{"class":571},[561,894,652],{"class":588},[561,896,640],{"class":571},[561,898,621],{"class":571},[561,900,901],{"class":887},"   \u002F\u002F Public endpoints\n",[561,903,904,906,909,911,913],{"class":563,"line":663},[561,905,878],{"class":571},[561,907,908],{"class":588},"\u002Fapi\u002Fhealth",[561,910,640],{"class":571},[561,912,621],{"class":571},[561,914,915],{"class":887},"      \u002F\u002F Health checks\n",[561,917,918,921],{"class":563,"line":684},[561,919,920],{"class":575},"  ]",[561,922,660],{"class":571},[561,924,925,927],{"class":563,"line":698},[561,926,701],{"class":571},[561,928,704],{"class":575},[540,930,931],{},"For high-traffic apps, flip the model and only resolve sessions on routes that need them:",[551,933,935],{"className":553,"code":934,"language":556,"meta":557,"style":557},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[543,936,937,953,981],{"__ignoreMap":557},[561,938,939,941,943,945,947,949,951],{"class":563,"line":564},[561,940,606],{"class":605},[561,942,609],{"class":575},[561,944,612],{"class":571},[561,946,576],{"class":615},[561,948,618],{"class":575},[561,950,621],{"class":571},[561,952,624],{"class":571},[561,954,955,957,959,961,963,966,968,970,972,975,977,979],{"class":563,"line":595},[561,956,666],{"class":630},[561,958,634],{"class":571},[561,960,637],{"class":575},[561,962,640],{"class":571},[561,964,965],{"class":588},"\u002Fapi\u002Fdashboard\u002F**",[561,967,640],{"class":571},[561,969,621],{"class":571},[561,971,585],{"class":571},[561,973,974],{"class":588},"\u002Fapi\u002Faccount\u002F**",[561,976,640],{"class":571},[561,978,657],{"class":575},[561,980,660],{"class":571},[561,982,983,985],{"class":563,"line":602},[561,984,701],{"class":571},[561,986,704],{"class":575},[540,988,989,991,992,994,995,998,999,1002,1003,1005,1006,1008],{},[543,990,786],{}," and ",[543,993,766],{}," use glob patterns (",[543,996,997],{},"*",", ",[543,1000,1001],{},"**","). Provide both if you need granular control, and ",[543,1004,766],{}," wins over ",[543,1007,786],{},".",[720,1010,1012],{"id":1011},"react-to-identification","React to identification",[540,1014,1015,1016,1018],{},"Use ",[543,1017,805],{}," to react to user identification, for example to force-keep logs for premium users via tail sampling:",[551,1020,1022],{"className":553,"code":1021,"filename":555,"language":556,"meta":557,"style":557},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[543,1023,1024,1040,1067,1103,1130,1135,1140,1157,1182,1187],{"__ignoreMap":557},[561,1025,1026,1028,1030,1032,1034,1036,1038],{"class":563,"line":564},[561,1027,606],{"class":605},[561,1029,609],{"class":575},[561,1031,612],{"class":571},[561,1033,576],{"class":615},[561,1035,618],{"class":575},[561,1037,621],{"class":571},[561,1039,624],{"class":571},[561,1041,1042,1045,1047,1050,1054,1056,1059,1062,1065],{"class":563,"line":595},[561,1043,1044],{"class":615},"  onIdentify",[561,1046,634],{"class":571},[561,1048,1049],{"class":571}," (",[561,1051,1053],{"class":1052},"sHdIc","log",[561,1055,621],{"class":571},[561,1057,1058],{"class":1052}," session",[561,1060,1061],{"class":571},")",[561,1063,1064],{"class":605}," =>",[561,1066,624],{"class":571},[561,1068,1069,1072,1074,1077,1079,1082,1084,1087,1090,1092,1095,1097,1100],{"class":563,"line":602},[561,1070,1071],{"class":567},"    if",[561,1073,1049],{"class":630},[561,1075,1076],{"class":575},"session",[561,1078,1008],{"class":571},[561,1080,1081],{"class":575},"user",[561,1083,1008],{"class":571},[561,1085,1086],{"class":575},"plan",[561,1088,1089],{"class":571}," ===",[561,1091,585],{"class":571},[561,1093,1094],{"class":588},"enterprise",[561,1096,640],{"class":571},[561,1098,1099],{"class":630},") ",[561,1101,1102],{"class":571},"{\n",[561,1104,1105,1108,1110,1113,1116,1119,1122,1124,1126,1128],{"class":563,"line":627},[561,1106,1107],{"class":575},"      log",[561,1109,1008],{"class":571},[561,1111,1112],{"class":615},"set",[561,1114,1115],{"class":630},"(",[561,1117,1118],{"class":571},"{",[561,1120,1121],{"class":630}," _forceKeep",[561,1123,634],{"class":571},[561,1125,693],{"class":692},[561,1127,579],{"class":571},[561,1129,704],{"class":630},[561,1131,1132],{"class":563,"line":663},[561,1133,1134],{"class":571},"    }\n",[561,1136,1137],{"class":563,"line":684},[561,1138,1139],{"class":571},"  },\n",[561,1141,1142,1145,1147,1149,1151,1153,1155],{"class":563,"line":698},[561,1143,1144],{"class":615},"  onAnonymous",[561,1146,634],{"class":571},[561,1148,1049],{"class":571},[561,1150,1053],{"class":1052},[561,1152,1061],{"class":571},[561,1154,1064],{"class":605},[561,1156,624],{"class":571},[561,1158,1160,1163,1165,1167,1169,1171,1174,1176,1178,1180],{"class":563,"line":1159},8,[561,1161,1162],{"class":575},"    log",[561,1164,1008],{"class":571},[561,1166,1112],{"class":615},[561,1168,1115],{"class":630},[561,1170,1118],{"class":571},[561,1172,1173],{"class":630}," anonymous",[561,1175,634],{"class":571},[561,1177,693],{"class":692},[561,1179,579],{"class":571},[561,1181,704],{"class":630},[561,1183,1185],{"class":563,"line":1184},9,[561,1186,1139],{"class":571},[561,1188,1190,1192],{"class":563,"line":1189},10,[561,1191,701],{"class":571},[561,1193,704],{"class":575},[540,1195,1196,1197,1199,1200,1202,1203,1205],{},"Hooks fire after the session is resolved and ",[543,1198,548],{}," has set its fields. They run on every request that passes the ",[543,1201,786],{},"\u002F",[543,1204,766],{}," filter, so keep them fast and side-effect-free.",[1207,1208,1209,1214],"tip",{},[540,1210,1211,1212,634],{},"Common patterns for ",[543,1213,805],{},[1215,1216,1217,1221,1224],"ul",{},[1218,1219,1220],"li",{},"Force-keep audit logs for admins or high-value plans.",[1218,1222,1223],{},"Tag the request with feature flags or tenant info loaded from the session.",[1218,1225,1226],{},"Increment a per-user counter for billing.",[720,1228,1230],{"id":1229},"what-happens-when-auth-fails","What happens when auth fails",[540,1232,1233,1234,1237,1238,991,1240,1243],{},"The middleware catches every error from ",[543,1235,1236],{},"getSession"," and logs nothing, so your request keeps flowing whether the auth backend is up or down. 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Call it once at startup and reuse across requests.","md",[1257,1260],{"label":356,"icon":359,"to":357,"color":1258,"variant":1259},"neutral","subtle",{"label":370,"icon":373,"to":371,"color":1258,"variant":1259},{},{"title":361,"icon":364},{"title":535,"description":1254},"W5iPJDKIMXykmBxrqRGnyCbSUGNKZLZjNw0Sw3TEzU0",[1266,1268],{"title":356,"path":357,"stem":358,"description":1267,"icon":359,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":366,"path":367,"stem":368,"description":1269,"icon":316,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1786806598184]