Error: $injector:unpr Unknown Provider

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This error results from the $injector being unable to resolve a required dependency. To fix this, make sure the dependency is defined and spelled correctly. For example:
angular.module('myApp', [])
.controller('MyController', ['myService', function (myService) {
  // Do something with myService
}]);

 The above code will fail with $injector:unpr if myService is not defined.

 For More visit https://docs.angularjs.org/error/$injector/unpr

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