Add None schema

schemas/none.py

@@ -0,0 +1,18 @@
+from pydantic import BaseModel, Field
+
+class MessageBase(BaseModel):
+    message: str = Field(default="yoloo!!", min_length=1)
+
+    class Config:
+        schema_extra = {
+            "example": {
+                "message": "yoloo!!"
+            }
+        }
+
+class MessageCreate(MessageBase):
+    pass
+
+class Message(MessageBase):
+    class Config:
+        orm_mode = True