Improve Slurm location configuration documentation

[adidanes]

Issue Type

Put an X between the brackets of the corresponding issue type

• Bug report
• Documentation issue report
• Improvement request

Description

Its not clear enough how to configure in the slurm.Compute resources, the credentials property values of the endpoint capability.
The credentials are the one used to create the resource, or the one used to connect to it once created ? Or both ?
Specify that if the user property is set, the token_type must be set to "password" or to "private_key".

Expected behavior

Priority

Low

• High = We should stop anything we are doing and do this. If you're writing this calmly, you should probably choose another option. If it's really that urgent, please make sure we read this.
• Medium = It's important that we do this within a few days.
• Low = We will consider this on our next sprint planning.

(Please be aware that your priority may not match ours, we'll use this as guidance only).