MongoServerError: E11000 duplicate key error collection with no collection - reactjs

Question

Why I'm getting this error!!
GOOGLE USER: null
/Users//my-blog/api/node_modules/mongodb/lib/operations/insert.js:53
return callback(new error_1.MongoServerError(res.writeErrors[0]));
^
MongoServerError: E11000 duplicate key error collection: blog.users
index: email_1 dup key: { email: "" }
I dropped the whole collection in Mongodb and when I tried again it gave me the same error but the data stored in MongoDB collection, the problem is with the error it stops the whole app from running. I don't know where I went wrong or what I'm missing.
Auth.js Code:
router.get("/google", passport.authenticate("google", {
scope: ["profile", "email"] }));
router.get("/auth/google/callback", passport.authenticate("google", {
successRedirect: "http://localhost:3000/",
failureRedirect: "/googleLogin/failed"
}));
router.get("/googleLogin/success", async (req, res)=>{
if(req.user){
const user = await User.findOne({provider_id: req.user.id,
provider: req.user.provider})
if(user){
res.status(200).json({
success: true,
message: "success",
user: user
})
console.log("GOOGLE USER IS: " + user)
}else{
const checkUserEmail = await User.findOne({email: req.user.email})
if(checkUserEmail){
res.status(401).json({
success: false,
message: "User already Exist with this email id",
})
}else{
const user = await User.create({
username: req.user.name.givenName+ "_" +req.user.name.familyName,
firstName: req.user.name.givenName,
lastName: req.user.name.familyName,
email: req.user.emails[0].value,
provider: req.user.provider,
provider_id: req.user.id,
// profilePic: req.user.photos?.[0]?.value,
});
res.status(200).json({
success: true,
message: "success",
user: user
})
}
}
console.log("GOOGLE USER: ", user);
}
})
router.get("/googleLogin/failed", (req, res)=>{
if(req.user){
res.status(401).json({
success: false,
message: "failure",
})
}
})
I THINK the code keeps running nonstop ! thats why it giving me the error even so the collection is empty, it sign up the user then it sign up again non stop. I think that it should be a done() in the code but I didn't know how to fix it.
Passport.js Setup:
passport.use(new GoogleStrategy({
clientID: process.env.REACT_APP_GOOGLE_CLIENT_ID,
clientSecret: process.env.REACT_APP_GOOGLE_CLIENT_SECRET,
callbackURL: "/auth/google/callback",
passReqToCallback: true,
scope: ["profile", "email"],
},
function(request, accessToken, refreshToken, profile, done){
console.log(profile.emails[0].value);
console.log(profile.photos[0].value);
return done(null, profile)
}
));
passport.serializeUser((user, done)=>{
done(null, user)
})
passport.deserializeUser((user, done)=>{
done(null, user)
})
Here is my User Schema: User.js
const mongoose = require('mongoose');
const UserSchema = new mongoose.Schema({
username: {
type: String,
required: false,
/* Can't create a user with the same username */
unique: true,
minlength: 3,
maxlength: 30,
},
firstName: {
type: String,
required: false,
unique: false,
maxlength: 20,
},
lastName: {
type: String,
required: false,
unique: false,
},
email: {
type: String,
required: true,
unique: true,
},
password: {
type: String,
},
repeatPassword: {
type: String,
},
profilePic: {
type: String,
default: "",
},
birthday: {
type: String,
required: false,
unique: false,
},
country: {
type: String,
required: false,
unique: false,
},
googleId: {
type: String
},
provider: {
type: String,
default: "email"
},
provider_id: {
type: String,
}
},
{ timestamps: true }
);
module.exports = mongoose.model("User", UserSchema);