Are you the team's admin?
Sign in at https://app.tabnine.com/signin
Reach 'Team AI':
GitHub integration - Accelerate your Tabnine’s Team Learning Algorithm, by granting read-access to GitHub repositories that you specify.
GitLab integration - Accelerate your Tabnine’s Team Learning Algorithm, by granting read-access to your GitLab repositories.
BitBucket integration - Accelerate your Tabnine’s Team Learning Algorithm, by granting read-access to your Bitbucket repositories.
Once enabled, your AI assistant will begin to learn your team's coding standards and best practices, providing custom code completions based on your team's repos, preferences and patterns.