diff --git a/packages/client/src/actions/ActionTypes.ts b/packages/client/src/actions/ActionTypes.ts
index 4f7a854..6992c8f 100644
--- a/packages/client/src/actions/ActionTypes.ts
+++ b/packages/client/src/actions/ActionTypes.ts
@@ -3,14 +3,23 @@
 // section: Type inference in conditional types
 type Unpacked<T> = T extends Promise<infer U> ? U : T
 import {IAction} from './IAction'
+import {IErrorAction} from './IErrorAction'
 
 // Also from TypeScript handbook:
 // https://www.typescriptlang.org/docs/handbook/advanced-types.html
 type FunctionProperties<T> = {
-  [K in keyof T]: T[K] extends (...args: any[]) => IAction<any, string> ? {
+  [K in keyof T]:
+  T[K] extends (...args: any[]) => IAction<any, string>
+  ? {
     payload: Unpacked<ReturnType<T[K]>['payload']>,
     type: Unpacked<ReturnType<T[K]>['type']>,
-  }: never
+  }
+  : T[K] extends (...args: any[]) => IErrorAction<string>
+  ? {
+    error: Error,
+    type: Unpacked<ReturnType<T[K]>['type']>,
+  }
+  : never
 }
 
 // https://stackoverflow.com/questions/48305190/
diff --git a/packages/client/src/actions/IErrorAction.ts b/packages/client/src/actions/IErrorAction.ts
new file mode 100644
index 0000000..3a1b792
--- /dev/null
+++ b/packages/client/src/actions/IErrorAction.ts
@@ -0,0 +1,4 @@
+export interface IErrorAction<ActionType extends string> {
+  error: Error,
+  type: ActionType
+}
diff --git a/packages/client/src/actions/UserActions.ts b/packages/client/src/actions/UserActions.ts
index 7354734..2780155 100644
--- a/packages/client/src/actions/UserActions.ts
+++ b/packages/client/src/actions/UserActions.ts
@@ -1,22 +1,19 @@
 import {ActionTypes} from './ActionTypes'
 import {IAPIDef, ICredentials, IUser} from '@rondo/common'
+import {IAction} from './IAction'
+import {IErrorAction} from './IErrorAction'
 import {IHTTPClient} from '../http/IHTTPClient'
 
 export enum UserActionKeys {
   USER_LOG_IN = 'USER_LOG_IN',
-  USER_LOG_IN_FULFILLED = 'USER_LOG_IN_FULFILLED',
+  USER_LOG_IN_PENDING = 'USER_LOG_IN_PENDING',
   USER_LOG_IN_REJECTED = 'USER_LOG_IN_REJECTED',
 
   USER_LOG_OUT = 'USER_LOG_OUT',
-  USER_LOG_OUT_FULFILLED = 'USER_LOG_OUT_FULFILLED',
+  USER_LOG_OUT_PENDING = 'USER_LOG_OUT_PENDING',
   USER_LOG_OUT_REJECTED = 'USER_LOG_OUT_REJECTED',
 }
 
-interface IAction<PayloadType, ActionType> {
-  payload: Promise<PayloadType> | PayloadType,
-  type: ActionType
-}
-
 export class UserActions {
   constructor(protected readonly http: IHTTPClient<IAPIDef>) {}
 
@@ -27,6 +24,13 @@ export class UserActions {
     }
   }
 
+  logInError(error: Error): IErrorAction<UserActionKeys.USER_LOG_IN_REJECTED> {
+    return {
+      error,
+      type: UserActionKeys.USER_LOG_IN_REJECTED,
+    }
+  }
+
   logOut(): IAction<unknown, UserActionKeys.USER_LOG_OUT> {
     return {
       payload: this.http.get('/auth/logout'),
diff --git a/packages/client/src/reducers/user.ts b/packages/client/src/reducers/user.ts
index baac40d..81554a5 100644
--- a/packages/client/src/reducers/user.ts
+++ b/packages/client/src/reducers/user.ts
@@ -2,18 +2,22 @@ import {IUser} from '@rondo/common'
 import {UserActionKeys, UserActionType} from '../actions/UserActions'
 
 interface IState {
+  error?: string,
   user?: IUser
 }
 
 const defaultState: IState = {
+  error: undefined,
   user: undefined,
 }
 
 export function user(state = defaultState, action: UserActionType): IState {
   switch (action.type) {
     case UserActionKeys.USER_LOG_IN:
-      return {user: action.payload}
+      return {...state, user: action.payload}
     case UserActionKeys.USER_LOG_OUT:
-      return {user: undefined}
+      return {...state, user: undefined}
+    case UserActionKeys.USER_LOG_IN_REJECTED:
+      return {...state, error: action.error.message}
   }
 }