Logout endpoint (#47)

Delete in memory session when user logout from mcs

lint fixes

Click logout button triggers logout request

Clicking the actual logout button send the POST /logout request on mcs
UI

Co-authored-by: Daniel Valdivia <hola@danielvaldivia.com>

restapi/embedded_spec.go

@@ -691,6 +691,26 @@ func init() {
         }
       }
     },
+    "/logout": {
+      "post": {
+        "tags": [
+          "UserAPI"
+        ],
+        "summary": "Logout from mcs.",
+        "operationId": "Logout",
+        "responses": {
+          "200": {
+            "description": "A successful response."
+          },
+          "default": {
+            "description": "Generic error response.",
+            "schema": {
+              "$ref": "#/definitions/error"
+            }
+          }
+        }
+      }
+    },
     "/policies": {
       "get": {
         "tags": [
@@ -2263,6 +2283,26 @@ func init() {
         }
       }
     },
+    "/logout": {
+      "post": {
+        "tags": [
+          "UserAPI"
+        ],
+        "summary": "Logout from mcs.",
+        "operationId": "Logout",
+        "responses": {
+          "200": {
+            "description": "A successful response."
+          },
+          "default": {
+            "description": "Generic error response.",
+            "schema": {
+              "$ref": "#/definitions/error"
+            }
+          }
+        }
+      }
+    },
     "/policies": {
       "get": {
         "tags": [