curl to query user for a user's email address

[Zach Wong]

Hi

What's the correct url endpoint along with query details to query a user for his/her email address ?
What are the possible variations of endpoint with query options ?

We tried 

curl --header "zsessionid:<apikey>" -H "Content-Type: application/json" https://rally1.rallydev.com/slm/webservice/v2.0/user?query=\(EmailAddress CONTAINS "[e-mail]"\)
curl --header "zsessionid:<apikey>" -H "Content-Type: application/json" https://rally1.rallydev.com/slm/webservice/v2.0/user?query=\(DisplayName CONTAINS "Test Name"\)

None works with error "Access Denied"