An LSP.expert team can have as many members as you wish.
To add a new user, simply click on 'Add a user' under Settings > Users, roles and permissions.
In the popup that opens, you will have to enter the name and the email address of the new user + the role you would like to give them in LSP.expert.
Once you added the user, they will receive an email asking them to join the team.
To manage your roles in LSP.expert, see this article: https://help.lsp.expert/en/articles/2558507-can-i-manage-the-permissions-of-the-users-in-my-team
If you're using LSP.expert V1
An LSP.expert team can have as many members as you wish. New team-mates can only be added by the Owner or Administrator of the account.
To add a new user, simply click on Add a user in the Users tab (under Settings).
You type the name and the email address of this user, and you define which role he/she will have in LSP.expert.
There are 3 different roles in LSP.expert:
Owner: The owner of the account is the one who creates the account. He has all rights possible in the app and can add new members to the team. He's also the person managing the subscription to LSP.expert, the credit card information, etc.
In the Settings menu, the Owner can see all tabs (all "normal" tabs + Billing + Account + Localization).
Administrator: The Adminitrator has all rights possible in the app, except those linked to the LSP.expert subscription. That's why he can't see the Billing tab in the Settings menu.
User: A User is anyone working with LSP.expert without being authorized to see/update the account specific data. That's why he can't see the Billing tab (all data related to the subscription to LSP.expert), and the Account tab (where you can change the company data, its logo, etc.). Moreover, a User can't change the localization settings of the account (how the dates, numbers, etc. are displayed).
The padlock icon on the right allows you to give or take back the Administrator role for this user.
Once you added the user, he/she will receive an email asking him/her to join the team.