[ ]add field: exchange / local

[ ]return filtered users

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[ ](isolate home app(it is currently handled by login_and_signup))

[ ]after logging out, dialogue window "thank you for using NUSXchange, {{user.username}}" shows up

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[v]verify: Register with a profile model 
[v]display the profile model details 
[v]enable /me to display my info in details
[v]me/settings to update fields in the profile obj
[v]display the profile model details