Add detection template for OAUTH2

See https://auth0.com/docs/protocols/protocol-oauth2#token-endpoint

technologies/oauth2-detect.yaml

@@ -0,0 +1,19 @@
+id: oauth2-detect
+
+info:
+  name: OAuth 2.0 Authorization Server Detection Template
+  author: righettod
+  severity: info
+  description: Try to detect OAuth 2.0 Authorization Server via the "oauth/token" endpoint
+  tags: tech,oauth
+
+requests:
+  - method: POST
+    path:
+      - "{{BaseURL}}/oauth/token"
+    body: "grant_type=authorization_code&client_id=xxx&redirect_uri=https%3A%2F%2Fprojectdiscovery.io&code=xxx&client_secret=xxx"
+
+    matchers:
+      - type: status
+        status:
+          - 401