add azaion loader

Azaion.Loader/credentials.pyx

@@ -0,0 +1,15 @@
+from msgpack import unpackb
+
+cdef class Credentials:
+
+    def __init__(self, str email, str password):
+        self.email = email
+        self.password = password
+
+    @staticmethod
+    cdef from_msgpack(bytes data):
+        unpacked = unpackb(data, strict_map_key=False)
+        return Credentials(
+            unpacked.get("Email"),
+            unpacked.get("Password"))
+