I keep getting this message every time i run the code ....any help
/*
Arduino: 1.8.13 (Windows 10), Board: "TTGO LoRa32-OLED V1, 80MHz, 921600, None"
C:\Users\User\Documents\Arduino\main\ttn.ino: In function 'void onEvent(ev_t)':
ttn:160:61: error: 'LMIC_getSessionKeys' was not declared in this scope
LMIC_getSessionKeys(&netid, &devaddr, nwkKey, artKey);
^
C:\Users\User\Documents\Arduino\main\ttn.ino: In function 'bool ttn_setup()':
ttn:251:57: error: 'os_init_ex' was not declared in this scope
return ( 1 == os_init_ex( (const void *) &lmic_pins ) );
^
C:\Users\User\Documents\Arduino\main\ttn.ino: In function 'void ttn_set_cnt()':
ttn:386:26: error: 'LMIC_setSeqnoUp' was not declared in this scope
LMIC_setSeqnoUp(count);
^
Multiple libraries were found for "SSD1306Wire.h"
Used: C:\Users\User\Documents\Arduino\libraries\esp8266-oled-ssd1306-master
Not used: C:\Users\User\Documents\Arduino\libraries\ESP8266_and_ESP32_OLED_driver_for_SSD1306_displays
exit status 1
'LMIC_getSessionKeys' was not declared in this scope
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
*/