json - chown illegal group name & getting Error for bower -

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in command line when entering:

sudo chown joannak:joannak~/.config/configstore/insight-bower.json

i 

chown: joannak: illegal group name.

i doing because having issue trying install bower. keeps giving me error:

error: eacces: permission denied, open '/users/joannak/.config/configstore/insight-bower.json' error: eacces: permission denied, open don't have access file.

i working on mac , administrator. how can fix this. help!

i updated syntax , stopped getting illegal group name following:

sudo chown joannak: ~/.config/configstore/insight-bower.json

i need verify if bower working now.

i updated syntax , stopped getting illegal group name following:

sudo chown joannak: ~/.config/configstore/insight-bower.json


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