post deprecated
https://iris.trackunit.com/api/organization/v1/users/activations/
Activate a user and set the username/password. The activation identifier is received per email as part of the user creation flow. Also the identifier is part of the create user api response. Deprecation notice: This endpoint will no longer be available. The user will be required to activate the account by following the link in the email. If a specific username is required it can be set as part of the create user request.