Adds the AuthPlugin. Closes #875 (#877)

Author: waldekmastykarz

.editorconfig

@@ -143,7 +143,7 @@ csharp_new_line_before_else = true
 csharp_new_line_before_finally = true
 csharp_new_line_before_members_in_anonymous_types = true
 csharp_new_line_before_members_in_object_initializers = true
-csharp_new_line_before_open_brace = none
+csharp_new_line_before_open_brace = all
 csharp_new_line_between_query_expression_clauses = true
 
 # Indentation preferences