[Python] Pydantic convert underscores in keys to hyphen when exporting to json

I have a class

class SampleModel(BaseModel):
first_name: str
last_name int


When I export it to json, I want to json to be

{
"first-name": "john doe",
"last-name": 1234
}


I was going to use aliases, but does pydantic have a config or an option to directly do this for all fields in a model?

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