Kibana SAML Integration

Hi Support,
I am new to this. I am facing issue configuring SAML. I want to know what is exchange_key and where to get the Key.

may be this will help:

I used a fantasy key (‘0123…’) with a length of 32 characters as an exchange_key.

see:

“The key to sign the token. The algorithm is HMAC256, so it should have at least 32 characters.”