[rewrite] Updated backend structure a bit and started working on registration

backend/app/schemas/user_register_schema.py

@@ -0,0 +1,13 @@
+from typing import Optional
+from pydantic import BaseModel, EmailStr, Field
+
+
+class UserRegisterSchema(BaseModel):
+    username: str = Field(..., min_length=3, max_length=64)
+    email: EmailStr = Field(...)
+    phone_number: str = Field(..., min_length=10, max_length=15, pattern=r'^\+[0-9]{1,3} [0-9]{1,9}$')
+    password: str = Field(..., min_length=6, max_length=128)
+    shop_id: Optional[int] = None
+
+    class Config:
+        orm_mode = True