Add globus auth code

[Cadair]

No description provided.

[codecov]

Codecov Report

Merging #46 into master will increase coverage by 0.12%.
The diff coverage is 98.63%.

@@            Coverage Diff            @@
##           master     #46      +/-   ##
=========================================
+ Coverage   96.98%   97.1%   +0.12%     
=========================================
  Files          16      18       +2     
  Lines         861     934      +73     
=========================================
+ Hits          835     907      +72     
- Misses         26      27       +1

Impacted Files	Coverage Δ
dkist/utils/globus/__init__.py	100% <100%> (ø)
dkist/utils/globus/auth.py	98.61% <98.61%> (ø)

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