Don't allow users to change their name

[codecov[bot]]

Codecov Report

Merging #371 (f5a68ae) into master (e4cf69a) will decrease coverage by 0.14%. The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master     #371      +/-   ##
============================================
- Coverage     30.47%   30.33%   -0.14%     
+ Complexity      525      523       -2     
============================================
  Files            79       79              
  Lines          1992     2001       +9     
============================================
  Hits            607      607              
- Misses         1385     1394       +9     

Files	Coverage Δ
app/Http/Controllers/UserController.php	7.84% <0.00%> (-0.58%)	:arrow_down:
app/User.php	26.53% <0.00%> (-1.13%)	:arrow_down:

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