How do I save the data entered to a excel file?

User Name	Password
User1	        password
ser1	        assword
er1	        ssword
r1	        sword
1	        word
	        ord
	        rd
	        d

def setCredentials(self):
    username = self.eUSER.get()
    password = self.ePASS.get()
    print("username", username)
    print("password", password)

def insert(self) :
    current_row = sheet.max_row
    if (self.eUSER.get() == "" and
        self.ePASS.get() == "" ):
       print("empty input")
       return
    else :
          sheet.cell(row=current_row + 1, column=1).value = self.eUSER.get()
          sheet.cell(row=current_row + 1, column=2).value = self.ePASS.get()
          self.eUSER.bind("<Return>", self.focusU)
          self.ePASS.bind("<Return>", self.focusP)
          self.eUSER.grid(row=1, column=1, ipadx="100")
          self.ePASS.grid(row=2, column=1, ipadx="100")
          sheet.column_dimensions['A'].width = 40
          sheet.column_dimensions['B'].width = 40
          sheet.column_dimensions['C'].width = 40
          sheet.cell(row=1, column=1).value = "User Name"
          sheet.cell(row=1, column=2).value = "Password"
          sheet.cell(row=1, column=3).value = "Security question"
          wb.save(r'C:\Users\Hennie\Desktop\new\sheet.xlsx')
    self.clear()
    self.eUSER.focus_set()
    self.insert()
    return

self.LOGIN = tk.Button(self, text = "Create new user", fg="black", command =lambda :[self.setCredentials(), self.insert()])