When building out your developer/admin team on the manage team page here are some things to consider:
Team members @handle can only be added to a dev account if:
- The @handle is not suspended, protected, muted or blocked by the @handle account admin
- The @handle must have a verified email address and allow emails
- The @handle is not a member of any other dev account.
- The @handle has not applied or been approved for their own dev account
- If the @handle was invited to join the dev account, but then the invite was revoked, the @handle cannot be re-invited for 24 hours.