added fields in IAM Identity struct

[gbiagini97]

Added CognitoIdentityAuthProvider and CognitoIdentityAuthType

Issue #, if available:

Description of changes:

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[bmoffatt]

Hey @gbiagini97 do you have a link handy to the AWS docs for these fields that I can validate this PR against?

[gbiagini97]

Hey @bmoffatt sorry forgot to attach everything.
Here's the documentation: please check under Identity->AWS_IAM authorization

[codecov-commenter]

Codecov Report

Merging #440 (16e3a71) into main (a0b8eda) will decrease coverage by 0.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #440      +/-   ##
==========================================
- Coverage   72.18%   72.01%   -0.18%     
==========================================
  Files          19       19              
  Lines        1039     1054      +15     
==========================================
+ Hits          750      759       +9     
- Misses        221      225       +4     
- Partials       68       70       +2     

Impacted Files	Coverage Δ
events/epoch_time.go	72.72% <0.00%> (-6.59%)	⬇️

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