I am new to Android Studio. I am trying to work using the android-map-utils library. But it is giving me the following error. 
 `Error:(64) A problem occurred evaluating project ':library'.
  > No such property: sonatypeUsername for class: org.gradle.api.internal.project.DefaultProject_Decorated`
Can anyone help me with this issue and also tell me a easy way to import libraries in android studio?
 
     
    