feat: Better error messages in response

[carlqt]

Is your feature request related to a problem? Please describe.
Current error message:

Failed to create the user: jet: pq: duplicate key value violates unique constraint "idx_users_on_name"

Describe the solution you'd like
Use error values

match the errors from the DB e.g. errors from Column Checks

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.