Get list of user groups with Facebook API issue -

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i'm using facebook api user groups response object not returning array or containing user groups.

i checked if i'm connected groups (public , private) , yes, i'm.

below code:

<fb:login-button scope="public_profile,email,user_birthday,user_education_history,user_location,user_groups" onlogin="checkloginstate();"> </fb:login-button>

any idea?

thank you!


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