Introducing support for "Adding users to an environment" from Power platform admin center

  1. From the Power Platform admin center, select the environment to which you want to add users.

  2. Select Settings > Users + permissions > Users.

  3. Add user.

  4. In the Add user pane, enter the user's name or email address, select it, and add them to the environment. Note the requirements for successfully adding a user, and see enable a user in an environment for details about how to ensure the requirements are met.

  5. After a user is added to the environment, assign a security role to the user to configure their access to resources in the environment.

Detailed documentation here: https://docs.microsoft.com/en-us/power-platform/admin/add-users-to-environment