Allow provider IDs without audiences

[bradfriedman]

No description provided.

[codecov-io]

Codecov Report

Merging #39 into master will decrease coverage by 0.03%.
The diff coverage is 80%.

@@            Coverage Diff             @@
##           master      #39      +/-   ##
==========================================
- Coverage   95.69%   95.66%   -0.04%     
==========================================
  Files          29       29              
  Lines        2971     2973       +2     
==========================================
+ Hits         2843     2844       +1     
- Misses        128      129       +1

Impacted Files	Coverage Δ
endpoints_management/control/service.py	98.9% <80%> (-0.37%)	⬇️

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