When validating account and odoo send a 403, an error should be sent

[vaab]

If the account is admin on comchain side but not in odoo's side, account validation interface is shown and validate button can be pressed but will end in a 403 that is not clearly dealt with for the end user.

1 - the failed request to odoo should be bubbled up to the user
2 - it could be re-written on the way to be clearly stated to the user that an inconsistence between comchain and odoo was detected and that the account is not member of the group comchain manager on odoo side.
3 - this inconsistence could be checked and issue a warning after we got the info that we are admin on the comchain side, but not on the odoo's side right in the dashboard.

[seegwen]

@vaab since I'm 0% active on the Odoo side of things, could you help me and indicate which user is, or help setting up the user which is, admin on comchain and not on odoo ?

Thanks ahead.