Team members will include the members of child teams.

To get a user's membership with a team, the team must be visible to the authenticated user.

Note: You can also specify a team by org_id and team_id using the route GET /organizations/{org_id}/team/{team_id}/memberships/{username}.

Note:
The response contains the state of the membership and the member's role.

The role for organization owners is set to maintainer. For more information about maintainer roles, see see Create a team.
Get team membership for a user