Fix an incorrect type

src/app/dialogues/credentials/credentials.component.ts

@@ -2,7 +2,7 @@ import { Component, OnInit, Inject } from '@angular/core';
 import { MAT_DIALOG_DATA, MatTableDataSource } from '@angular/material';
 
 import { UserService } from '../../user.service';
-import * as t from '../../types/types.module';
+import { DeploymentStateItem, Service, CredentialState } from '../../types/types.module';
 
 @Component({
   selector: 'app-credentials',
@@ -12,8 +12,8 @@ import * as t from '../../types/types.module';
 export class CredentialsComponent implements OnInit {
 
   public columns = ["name", "value"];
-  public stateItem: t.DeploymentStateItem;
-  public service: t.Service;
+  public stateItem: DeploymentStateItem;
+  public service: Service;
   public credentialCount: number = 0;
   public table: MatTableDataSource<any>;
 

src/app/types/types.module.ts

@@ -80,7 +80,7 @@ export interface DeploymentStateItem {
   state: string;
   questionnaire: JSONObject;
   credentials: JSONObject;
-  credential_states: CredentialState;
+  credential_states: CredentialState[];
   message: string;
 }