Hi Rohit,
Please follow below mentioned steps :
1. In CMC go to Application
2. Right Click on Webi Rich Client -> Select User Security.
3. In user security give full control for user/user group.
If you would like to give more Edit Rights to users please follow above mentioned steps for Connection and Universe in CMC.
For Connection and Universe you can go to Manage -> Top Level Security to grant permissions.
Hope this will help..!!!
Regards,
Veer S.