Client question – impostor syndrome

Hello Coaches,

A very common term used in particular in the work relationship is the impostor syndrome.

Is there any content I can use as a coach certified by the LCS to help my client with this? She specifically asked me about this topic. I was thinking of using tools related to the beliefs we have about ourselves and the fact that the idea I have of what others may think of us is only a thought – not the reality. Any more specific leads on this?
Thanks a lot!