fix: swagger error and golangci-lint config

one overlooked swagger annotation issue
fix for golangci-lint config (format is not a valid property) - which
also fixes error reporting locally in certain editors

.golangci.yml

@@ -8,7 +8,10 @@
 # outputs it results from the linters it executes.
 output:
   # colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
-  format: colored-line-number
+  formats:
+    - format: json
+      path: stderr
+    - format: colored-line-number
 
   # print lines of code with issue, default is true
   print-issued-lines: true

api/auth/validate_oauth.go

@@ -30,7 +30,7 @@ import (
 //   '200':
 //     description: Successfully validated
 //     schema:
-//       "$ref": "#/definitions/Token"
+//       type: string
 //   '401':
 //     description: Unauthorized
 //     schema: