feat: auth backend implementation

backend/app/schemas.py

@@ -1,4 +1,7 @@
-from pydantic import BaseModel
+from pydantic import BaseModel, EmailStr
+
+
+# DB Schemas
 
 
 class ItemBase(BaseModel):
@@ -12,3 +15,36 @@ class Item(ItemBase):
 
     class Config:
         from_attributes = True
+
+
+class UserBase(BaseModel):
+    username: str
+    email: EmailStr
+
+
+class UserCreate(UserBase):
+    password: str
+
+
+class UserOut(UserBase):
+    id: int
+
+    class Config:
+        orm_mode = True
+
+
+# Other Schemas
+
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+
+class TokenData(BaseModel):
+    username: str | None = None
+
+
+class UserLogin(BaseModel):
+    username: str
+    password: str