Found Solution Over It Just changed the way I was passing parameters and also removed 'options' argument from post request.
let params = new URLSearchParams();
params.append('username',logincreds.username);
params.append('password',logincreds.password);
this.http.post(url, params)
.subscribe(data=>{
console.log(postParams);
console.log(data);
/*if(data.json().success=="success"){
}
else{
} */
}, error => {
console.log(error);
})
Use URLSearchParams instead of using array to collect parameters being passed to server