Change auth.py to be used in a FIPS system

[Jose-albino]

Expected Result

Using the requests to perform a HTTPS action is working in a FIPS environment

Actual Result

In UNIX environment with fips enabled the MD5 can't be used.
It provides this error

ValueError: [digital envelope routines: EVP_DigestInit_ex] disabled for FIPS

Solution

Apply this patch in auth.py

`

*** 145,151 ****
def md5_utf8(x):
if isinstance(x, str):
x = x.encode("utf-8")
! return hashlib.md5(x).hexdigest()
hash_utf8 = md5_utf8
elif _algorithm == "SHA":
--- 145,151 ----
def md5_utf8(x):
if isinstance(x, str):
x = x.encode("utf-8")
! return hashlib.md5(x,usedforsecurity=False).hexdigest()
hash_utf8 = md5_utf8
elif _algorithm == "SHA":

`