How to create user with root policy

Vault
1

I have created users in the vault with the root policy attached to it.

 *vault write auth/userpass/users/testuser password=testuser policies=root*

When I try to login with user testuser it failed exception is authentication failed authpass cannot create root token

2

you cannot assign the default “root” policy to any token, what you can do is to create another policy with the permissive policy look alike “root”