XCODE

i am very new to Xcode with 0 knowledge in dev

i tried a simple app and tried running it in my 7+

apple asked me for my dev id

i created it

but something came in between asking about my keychain pass

i totally forgot that

created a new keychain and deleted the existing one

now when i try running the app

it shows 3 errors

Code Signing Error: There are no accounts registered with Xcode. Add your developer account to Xcode

Code Signing Error: No signing certificate "iOS Development" found: No "iOS Development" signing certificate matching team ID "S2W3RGMRAC" with a private key was found.

Code Signing Error: Code signing is required for product type 'Application' in SDK 'iOS 11.0

please help

ideleted the dev profile and tried again

now 2 more errors

The user name or passphrase you entered is not correct.

No profiles for 'com.quadfsuren.I-Am-Rich' were found

Xcode couldn't find any iOS App Development provisioning profiles matching 'com.quadfsuren.I-Am-Rich'.

the entered password is correct