[bug] 由gitlab api 创建的用户首次登陆时，报500error

qa pipeline 在运行途中需要使用api创建一些user，创建完成后，使用该用户首次登陆时，系统报500 error。

Steps to reproduce

api url https://staging.jihulab.com/api/v4/users?private_token=xxxx

post body:

admin:false
email:qa-user-8fcd80b64f037cda@example.com
password:Pa$$w0rd
username:qa-user-8fcd80b64f037cda
name:QA User 8fcd80b64f037cda
skip_confirmation:true

Example Project

What is the current bug behavior?

What is the expected correct behavior?

Relevant logs and/or screenshots

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)

(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)

Results of GitLab application Check

Expand for output related to the GitLab application check

(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)
(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)
(we will only investigate if the tests are passing)

Possible fixes