add registration page with nickname/phone fields and fix lateinit crashes

sentence_api/models.py

@@ -138,12 +138,15 @@ class AuthRequest(BaseModel):
 
     username: str = Field(min_length=3, max_length=50, pattern=r"^[A-Za-z0-9_.-]+$")
     password: str = Field(min_length=8, max_length=128)
+    nickname: Optional[str] = Field(default=None, max_length=80)
+    phone: Optional[str] = Field(default=None, max_length=20)
 
 
 class UserPublic(BaseModel):
     id: str
     username: str
     nickname: str
+    phone: Optional[str] = None
     created_at: datetime