accessing response data from subscribe

Question

My api code

 app.post('/login',(req,res) => {
        if(req.body.username == "test" && req.body.password == "12345") res.json({status:true})
        else res.json({status:false,error:"user name or password is incorrect"})
    })

my angular code

  onSubmit(){
console.log(this.login.value)
this.credential = this.login.value
this.http.post("http://localhost:9001/user/login",this.credential)
.pipe(map(res => {
  
}))
.subscribe(responseData => {
 
  })

}

if I try to check the response data

    .subscribe(responseData => {
      if(responseData.status){}
})

it throws

error TS2339: Property 'status' does not exist on type 'void'.

what mistake did I make? can anyone explain