signup-form.ts

this.signUpForm = this.fb.group({
    first_name: ['', [
        Validators.required,
        Validators.maxLength(100)
    ]],
    last_name: ['', [
        Validators.required,
        Validators.maxLength(100)
    ]],
    email: ['', [
        Validators.required,
        Validators.maxLength(255),
        Validators.minLength(3),
        Validators.email
    ]
    ],
    password: ['', [...passwordValidators]],
    re_password: ['', [...passwordValidators]]
});