Add OAuth2 AuthZ Server Metadata example

tests/examples/metadata.py

@@ -0,0 +1,25 @@
+import bottle
+from bottle_oauthlib.oauth2 import BottleOAuth2
+from oauthlib import oauth2
+
+app = bottle.Bottle()
+app.auth = BottleOAuth2(app)
+app.authmetadata = BottleOAuth2(app)
+
+oauthlib_server = oauth2.LegacyApplicationServer(oauth2.RequestValidator())
+app.authmetadata.initialize(oauth2.MetadataEndpoint([oauthlib_server], claims={
+    "issuer": "https://xx",
+    "token_endpoint": "https://xx/token",
+    "revocation_endpoint": "https://xx/revoke",
+    "introspection_endpoint": "https://xx/tokeninfo"
+}))
+
+
+@app.get('/.well-known/oauth-authorization-server')
+@app.authmetadata.create_metadata_response()
+def metadata():
+    pass
+
+
+if __name__ == "__main__":
+    app.run()  # pragma: no cover