or download this
Installing CPAN (2.37)
gpg: Fatal: can't create directory '/cygdrive/c/Users/somia/AppData/Lo
+cal/.cpanp/.cpanplus/5.40.0/Installing CPAN (2.37)
gpg: Fatal: can't create directory '/cygdrive/c/Users/somia/AppData/Lo
+cal/.cpanp/.cpanplus/5.40.0/build/psZPVjvSp4/CPAN-2.37/C:/Users/somia
+/.gnupg': No such file or directory
==> BAD/TAMPERED signature detected! <==
[ERROR] Signature check failed for module 'CPAN' -- Not trusting this
+module, aborting install