Struggling to find a way to link an existing user with google oAuth using next-auth, here is my situation.
The flow is a bit odd for my case I believe; A user has the option to create a "Project" before registering. Basically they create a project and when they are ready they can "save the project". This will create a "Project" in my Mongo database as well as a user (without a password, this step is necessary to allow us to create generate a lead to sales with their information). Then once they have saved the project it takes them to a register modal where they can sign in using credentials or google Oauth.
So the issues it I am getting this error "OAuthAccountNotLinked" because the user email already exists in Mongo, I need the user to be unchanged because it is connected to the project they have already created. Therefore, when they use Google oAuth to sign in I need to link them with the user that's already been created.
I haven't found any good solutions to my issue at this, I'm relatively new to next-auth so any advice helps!!
Here is my next-auth file, not sure it will help much but let me know what might and I'll update.
const options = {
providers: [
Providers.Credentials({
name: 'Custom Provider',
credentials: {
username: { label: 'Email', type: 'text', placeholder: 'username' },
password: { label: 'Password', type: 'password', placeholder: 'password' }
},
async authorize(credentials) {
try {
const res = await fetch(
`${
process.env.NODE_ENV === 'development'
? process.env.NEXTAUTH_URL
: process.env.NEXTAUTH_URL_2
}/api/auth/signin`,
{
method: 'POST',
body: JSON.stringify(credentials)
}
);
const { user, error } = await res.json();
if (user) {
return Promise.resolve(user);
}
return Promise.reject(new Error(error));
} catch (error) {
return undefined;
}
}
}),
Providers.Google({
clientId: process.env.GOOGLE_ID,
clientSecret: process.env.GOOGLE_SECRET
})
],
pages: {
error: '/auth/error'
},
database: {
type: 'mongodb',
url: process.env.DATABASE_URL,
ssl: true,
// replicaSet: 'Cluster0-shard-0',
authSource: 'admin',
retryWrites: true,
synchronize: true
},
secret: process.env.SECRET,
session: { jwt: true, maxAge: 30 * 24 * 60 * 60 }, // 30 days
jwt: { secret: process.env.JWT_SECRET },
callbacks: {
signIn: async (user, account, profile) => {
return Promise.resolve(true);
},
redirect: async (url, baseUrl) => {
if (url.startsWith(baseUrl)) {
return Promise.resolve(url);
}
return Promise.resolve(baseUrl);
},
async session(session, token) {
if (token.user) {
session.user = token.user;
}
return session;
},
async jwt(token, user, account, profile, isNewUser) {
if (user) {
token.user = { _id: user._id, email: user.email, status: user.status, provider: 'credentials' };
}
if (account?.provider === 'google') {
token.user = { _id: user.id, email: user.email, status: 'client', provider: 'google' };
}
return token;
}
},
debug: false
};
export default (req, res) => NextAuth(req, res, options);