nextcloud oauth

[techknowlogick]

fix #7078

[techknowlogick]

Ready for review

[zeripath]

Looks good but I do admit I know nothing about nextcloud

[codecov-io]

Codecov Report

Merging #10562 into master will decrease coverage by <.01%.
The diff coverage is 47.05%.

@@            Coverage Diff             @@
##           master   #10562      +/-   ##
==========================================
- Coverage   43.71%   43.71%   -0.01%     
==========================================
  Files         585      585              
  Lines       82035    82026       -9     
==========================================
- Hits        35863    35856       -7     
+ Misses      41729    41728       -1     
+ Partials     4443     4442       -1

Impacted Files	Coverage Δ
modules/git/command.go	89.56% <ø> (ø)	⬆️
routers/api/v1/repo/pull.go	34.63% <0%> (ø)	⬆️
services/pull/pull.go	34.7% <0%> (-1.37%)	⬇️
services/pull/review.go	0% <0%> (ø)	⬆️
routers/repo/issue.go	38% <0%> (ø)	⬆️
models/pull_sign.go	34.86% <0%> (ø)	⬆️
services/pull/temp_repo.go	31.62% <0%> (+2.56%)	⬆️
routers/repo/pull.go	29.05% <40%> (+0.44%)	⬆️
modules/convert/pull.go	72.17% <57.14%> (+1.09%)	⬆️
services/pull/merge.go	49.34% <8.33%> (-0.12%)	⬇️
... and 13 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7aa4ab6...545e26c. Read the comment docs.