How to share the credentials with customer/users in ThingWorx foundation?

Hi,

I have successfully connected NodeMCU to thingworx, also getting real time data of the sensors on the platform. 

Now I want to give access to one dummy client, e.g my coligue. In this case I dont want to give administrator access. So, How shall I proceed?

1. This is my created thing 'NodeMCU'.                                                                             
2. I have created 1 user 'testuser1', in which I have given/attached Mashup created by me 'NodeMCU_mashup1'.
3. Please suggest how I can share Login URL and credentials with the dummy client.