+------------------+
             |      Client       |
             +--------+---------+
                      |
                      |
            +---------v---------+
            |   API Gateway      |
            +---------+---------+
                      |
 +--------------------+---------------------+
 |                    |                     |
 +----v-----+        +-----v-------+        +----v-----+
| Language |        | Authentication |     | Analytics |
|  Model   |        |    Service     |     |  Service  |
|  Service |        +---------------+     +-----------+
|  (GET /  |        |  (POST /login)|
| /complete|        +---------------+
| -text)   |
|  (POST / |
| /summarize)|
+----------+