Add params to GetUsersByRoleName

[upils]

Add params to list more than a 100 users with GetUsersByRoleName

Fixing #391

[upils]

Hi @Nerzal, is this possible to check this and let workflows run?

[Nerzal]

Hi, if you merge the main branch the tests should be able to run now :)

[upils]

Merge done, this should work now.

[codecov]

Codecov Report

Merging #392 (ec92883) into main (94bb940) will decrease coverage by 0.05%.
The diff coverage is 50.00%.

❗ Current head ec92883 differs from pull request most recent head 62cb042. Consider uploading reports for the commit 62cb042 to get more accurate results

@@            Coverage Diff             @@
##             main     #392      +/-   ##
==========================================
- Coverage   77.13%   77.08%   -0.06%     
==========================================
  Files           4        4              
  Lines        2152     2156       +4     
==========================================
+ Hits         1660     1662       +2     
- Misses        335      336       +1     
- Partials      157      158       +1     

Impacted Files	Coverage Δ
client.go	75.40% <50.00%> (-0.06%)	⬇️

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[upils]

I added a test to improve coverage.

I noticed the docker image used was keycloak:latest, which now points to 20.0.2. They seems to have reworked the way UserInfo can be accessed (see keycloak/keycloak-documentation@533b730) so both GetUserInfo and GetRawUserInfo are broken in this keycloak version. So I have pinned the keycloak version to 19.0. I can remove this if you prefer.

[Nerzal]

LGTM thank you for the contribution