Fix no session on social logins

[larixer]

What's the problem this PR addresses?

Fixes session absence on social logins

How did you fix it?

grantAccess used passwordHash as a part of a refresh secret key. Since passwordHash were not set by registerUser it was sometimes null, sometimes undefined and session was invalidated because of that. I'm using identityId instead of passwordHash, which should be unique and always defined.

[larixer]

@MassivDash Could you test this PR, please?

[MassivDash]

I just saw the changes you made, I'll test them out soon and let you know

[MassivDash]

So, I have tested this version, but unfortunately, it does not work correctly without somekind of passwordHash inserted into a table. Without the passwordHash, the csrf token gets created but the JSON web token gets an error.

server: backend debug read session { csrfToken: 'c8715cce6f1b96004e9700bcfaf2aca8' }
frontend debug loading <= refreshTokens({"refreshToken":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6MTMsImlhdCI6MTU3NDYxNzAyMiwiZXhwIjoxNTc1MjIxODIyfQ.cbulc-OAScAWBmXfnWyN92Urx22tXOgNBQZ1cMaF530"})
server: backend debug read session { csrfToken: 'c8715cce6f1b96004e9700bcfaf2aca8' }
server: backend debug {"errors":[{"message":"JsonWebTokenError: invalid signature","locations":[{"line":2,"column":3}],"path":["refreshTokens"],"extensions":{"code":"UNAUTHENTICATED","exception":{"stacktrace":["AuthenticationError: JsonWebTokenError: invalid signature","    at refreshTokens (/mnt/data/git/whatsoner/packages/server/build/index.js:2192:15)"]}}}],"data":null} <= undefined

With whatever passwordHash in the user table, it works correctly.