JSON.parse(localStorage.getItem('users') Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.

this.currentUser = JSON.parse(localStorage.getItem('currentUser')!);

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json parse error Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.ts(2345) Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.ts(2345) (method) Storage.getItem(key: string): string | null Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.ts(2345) var sessionStorage: Storage angular localStorage Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string' Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'. var localStorage: Storage localstorage ts error rgument of type 'string | null' is not assignable to parameter of type 'string'. localstorage + Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string' Argument of type 'string | null' is not assignable to parameter of type 'string'. localstorage parse Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.ts(2345) var localStorage: Storage rgument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'. 22 const user = JSON.parse(localStorage.getItem('user')) rgument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'. 21 const user: User = JSON.parse(localStorage.getItem('user')); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ argument of type 'string null' is not assignable to parameter of type 'string' localstorage var localStorage: Storage Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.ts(2345) Argument of type 'string | null' is not assignable to parameter of type 'string'. localstorgae Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string local storage' var localStorage: Storage Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string' Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type async storage object argument of type 'string null' is not assignable to parameter of type 'string'. localstorage JSON.parse(localStorage.getItem('users') Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'.
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