diff --git a/packages/amazon-cognito-identity-js/index.d.ts b/packages/amazon-cognito-identity-js/index.d.ts
index e5d6e99d12f..f3b90b2893b 100644
--- a/packages/amazon-cognito-identity-js/index.d.ts
+++ b/packages/amazon-cognito-identity-js/index.d.ts
@@ -76,6 +76,12 @@ declare module 'amazon-cognito-identity-js' {
 		clientMetadata: Record<string, string>;
 	}
 
+	export enum AuthenticationFlowType {
+		USER_SRP_AUTH = 'USER_SRP_AUTH',
+		USER_PASSWORD_AUTH = 'USER_PASSWORD_AUTH',
+		CUSTOM_AUTH = 'CUSTOM_AUTH',
+	}
+
 	export type ChallengeName =
 		| 'CUSTOM_CHALLENGE'
 		| 'MFA_SETUP'
@@ -324,7 +330,13 @@ declare module 'amazon-cognito-identity-js' {
 		AdvancedSecurityDataCollectionFlag?: boolean;
 	}
 
-	export class CognitoUserPool {
+	export interface CognitoUserPool {
+		advancedSecurityDataCollectionFlag: boolean;
+		clientId: string;
+		userPoolId: string;
+	}
+
+	export class CognitoUserPool implements CognitoUserPool {
 		constructor(
 			data: ICognitoUserPoolData,
 			wrapRefreshSessionCallback?: (
@@ -332,6 +344,10 @@ declare module 'amazon-cognito-identity-js' {
 			) => NodeCallback.Any
 		);
 
+		public clientId: string;
+		public userPoolId: string;
+		public advancedSecurityDataCollectionFlag: boolean;
+
 		public getUserPoolId(): string;
 		public getClientId(): string;
 
@@ -366,31 +382,50 @@ declare module 'amazon-cognito-identity-js' {
         public config: AWS.CognitoIdentityServiceProvider.Types.ClientConfiguration;
     }
     */
-	export class CognitoAccessToken {
+
+	export interface CognitoAccessToken {
+		jwtToken: string;
 		payload: { [key: string]: any };
+	}
 
+	export class CognitoAccessToken implements CognitoAccessToken {
 		constructor({ AccessToken }: { AccessToken: string });
 
+		public jwtToken: string;
+		public payload: CognitoAccessToken['payload'];
+
 		public getJwtToken(): string;
 		public getExpiration(): number;
 		public getIssuedAt(): number;
 		public decodePayload(): { [id: string]: any };
 	}
 
-	export class CognitoIdToken {
+	export interface CognitoIdToken {
+		jwtToken: string;
 		payload: { [key: string]: any };
+	}
 
+	export class CognitoIdToken implements CognitoIdToken {
 		constructor({ IdToken }: { IdToken: string });
 
+		public jwtToken: string;
+		public payload: CognitoIdToken['payload'];
+
 		public getJwtToken(): string;
 		public getExpiration(): number;
 		public getIssuedAt(): number;
 		public decodePayload(): { [id: string]: any };
 	}
 
-	export class CognitoRefreshToken {
+	export interface CognitoRefreshToken {
+		token: string;
+	}
+
+	export class CognitoRefreshToken implements CognitoRefreshToken {
 		constructor({ RefreshToken }: { RefreshToken: string });
 
+		public token: string;
+
 		public getToken(): string;
 	}