Allow user name "admin" to be created

[dacrudg]

Description

auth.go:570:createUserInContext() [E] CreateUser: name is reserved [name: admin]

Why can't we create a user named admin? This causes issues with my SSO setup where I use "admin" across all services, so now Gitea breaks when I login with SSO it tries to create that user and fails.

Gitea Version

1.19.0 and 1.22.2

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

No response

Screenshots

No response

Git Version

No response

Operating System

No response

How are you running Gitea?

Myself in docker

Database

MySQL/MariaDB

[eeyrjmr]

There is a reserved list

gitea/models/user.go

Line 715 in 9fd8b26

var (

Probably to protect their usage elsewhere. There is an issue to permit some flexibility over this

[lunny]

This user name was reserved because of the router conflicts. /admin now will display the administrator console. But maybe we can use /-/admin instead.

[dacrudg]

This user name was reserved because of the router conflicts. /admin now will display the administrator console. But maybe we can use /-/admin instead.

That would be great! And much appreciated