add /api/v1/sim-cards GET endpoint

dto.py

@@ -1,9 +1,10 @@
-class Device:
-    def __init__(self, access_key, device_type, name):
-        self.access_key = access_key
-        self.device_type = device_type
-        self.name = name
+from dataclasses import dataclass
 
+@dataclass
+class Device:
+    access_key: str
+    device_type: str
+    name: str
 
     def to_dict(self):
         return {
@@ -15,3 +16,16 @@ class Device:
     def convert(device_from_db) -> Device:
         return Device(*device_from_db)
 
+@dataclass
+class SimCard:
+    phone_number: str
+    device_access_key: str
+
+    def to_dict(self):
+        return {
+                'phone_number': self.phone_number,
+                'device_access_key': self.device_access_key
+               }
+
+    def convert(sim_from_db) -> SimCard:
+        return SimCard(*sim_from_db)