Giving error messages for pattern(regex) matching.

[harshalkumar-ishi]

how to give error message if pattern or regex not matched in model Field of pydantic pydantic.

i have a model with fields like as follows:

class AuthUserRealmCreate(BaseModel):

email_address: str = Field(title='Email Address', pattern=VALIDATION_REGEX.get('email')['regex'], widget=jp.QInput, html_input_type='email')
contact_number: str = Field(title='Contact Number',pattern=VALIDATION_REGEX.get('contact_number')['regex'], widget=jp.QInput, html_input_type='text', required=False)

i want to show custom message like "Email field is invalid." or "Contact number is invalid." in the UI.