src/Build.php
public function setHeaderClaim(string $key, $value): self
    {
        $this->header[$key] = $value;

        return $this;
    }
public function setHeaderClaim(string $key, $value): self
    {
        $this->header[$key] = $value;

        return $this;
    }
public function setHeaderClaim ( string $ key , $ value ) : self { $ this -> header [ $ key ] = $ value ; return $ this ; }
Add custom claims to the JWT header

@param string $key
@param mixed $value
@return Build
Add custom claims to the JWT header