refactor: improve passport strategy handling in async/await manner to prevent race conditions upon importing modules (#682)

api/strategies/index.js

@@ -0,0 +1,17 @@
+const passportLogin = require('./localStrategy');
+const googleLogin = require('./googleStrategy');
+const githubLogin = require('./githubStrategy');
+const discordLogin = require('./discordStrategy');
+const jwtLogin = require('./jwtStrategy');
+const facebookLogin = require('./facebookStrategy');
+const setupOpenId = require('./openidStrategy');
+
+module.exports = {
+  passportLogin,
+  googleLogin,
+  githubLogin,
+  discordLogin,
+  jwtLogin,
+  facebookLogin,
+  setupOpenId,
+};