Angular Password Validation

So I'm trying to do very simple password validation. All I want is it to have a minLength of 8. I've basically copy and pasted the example code, however I am still running into issues. No matter what I enter into the password field, it is returning an error. Am I missing something small?

<form [formGroup]="loginForm" (ngSubmit)="login()">
  <div class="md-form">
    <i class="fa fa-envelope prefix grey-text"></i>
    <input type="email" id="loginEmail" formControlName="email" class="form-control" data-error="Please format your email correctly." data-success=" " mdbInputDirective>
    <label for="loginEmail">Email</label>
  </div>

  <div class="md-form">
    <i class="fa fa-lock prefix grey-text"></i>
    <input type="password" id="loginPassword" formControlName="password" class="form-control" data-error="Password must be at least 8 characters in length." data-success=" " mdbInputDirective>
    <label for="loginPassword">Password</label>
  </div>

  <div class="text-center">
    <input type="submit" class="btn btn-default waves-light" mdbWavesEffect value="Login" [disabled]="!loginForm.valid">
  </div>
</form>



this.loginForm = new FormGroup ({
email: new FormControl(null,[Validators.email, Validators.required]),
password: new FormControl(null,[Validators.minLength(8)]) 
})

Any help is appreciated!