feat(auth): implement user authentication system

backend/node_modules/bcrypt/.editorconfig

@@ -0,0 +1,19 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[{package.json,*.yml}]
+indent_style = space
+indent_size = 2
+
+[appveyor.yml]
+end_of_line = crlf
+
+[*.md]
+trim_trailing_whitespace = false