AddDocument lets you add a document to a given index.

AddIndex lets you add a new index.

AddMapping lets you add mapping.

DeleteDocument lets you delete a document from a given index.

DeleteIndex lets you delete an Index.

GetDocument lets you read documents from an index.

GetNewClient will throw error message if there is any, during the call of NewClient */.

IndexExist checks if an index is already there.

UpdateDocument lets you update a specific document in a given index.

UpdateMapping lets you update the mapping of a given index.

Client is being called by the main.go every time the app is being started.

NewMapping lets you add mapping.