Spotinst allows you to manage your users in a very easy and flexible way to manage your users across your Organization and accounts.
In order to add users to accounts, you need to first add them to the organization. In order to do so, open the Settings in your Organization:
Under the organization tab, you can manage Admins (Users that holds editor permissions to all the accounts in the organization) and Users (Editors/Viewers).
Here is how to add new or existing users to accounts:
Choose if it's an existing or new user, the user's email, role (viewer/editor) and to which account you want to add the user (dropdown with the existing accounts):
At the Account level - you can see the list of users in the current account and add existing users from the organization.